Forum Discussion
Davydd
Jun 12, 2012Explorer
I learned something about DEF for my Sprinter yesterday. When the warning light comes on to add Diesel Exhaust Fluid it requires about 2 gallons. You are supposed to get 8-10,000 miles before the warning light comes on. What I learned is that just shuts off the warning. 2 gallons does not top it off. About a 1,000 miles ago my warning light came on and I added 2 gallons. I decided before heading out again I would top it off to where I could see the fluid in the fill neck. So I bought 2-1/2 gallons thinking I'd probably need less than a gallon. I filled and I filled and I filled - all 2-1/2 gallons and still could not see the fluid in the fill neck. I looked on the ground. Dry. Still need more. DEF is fairly cheap. I paid $10 for 2-1/2 gallons.
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